标题： 在CMS中寻找奇异的重顶夸克和底夸克伙伴 显示英文标题

标题： Search for exotic heavy top and bottom quark partners with CMS

摘要： 我们使用在质心系能量为$\sqrt{s} = 8$ TeV 的 LHC pp 碰撞数据，在 CMS 中寻找大质量的顶夸克和底夸克伙伴。这样的伙伴存在于预测矢量样夸克以解决层次问题并稳定希格斯玻色子质量的模型中。这些搜索涵盖了包含多个轻子和喷注多重性的末态范围，并根据分支比设定了质量和产率截面的限制。 显示英文摘要

摘要： We present searches for massive top and bottom quark partners at CMS using LHC pp collision data collected at centre-of-mass energy $\sqrt{s} = 8$ TeV. Such partners can be found in models predicting vector-like quarks to solve the hierarchy problem and stabilize the Higgs boson mass. The searches span a range of final states containing several lepton and jet multiplicities, and limits were set on mass and production cross sections as a function of branching ratios.